Microinverter

Abstract

The present invention relates to a microinverter comprising: a case in which a circuit board is disposed; a first connector disposed on one side of the case and connected to the circuit board; a second connector disposed on another side of the case and connected to the circuit board; and a support bracket on which the case is supported, wherein one of the case and the support bracket may have first locks disposed on the boundary thereof, and the other one of the case and the support bracket may have second locks which are coupled to the first locks.

Description

microinverter

[0001] The present invention relates to a micro inverter.

[0002] An inverter is a device that converts direct current (DC) into alternating current (AC). It is used in various industrial applications, including electric motor drives, uninterruptible power supplies (UPS), and active power filters, as well as in renewable energy conversion systems, including solar power generation, and hybrid vehicles.

[0003] Recently, the solar power inverter market, centered around the US, has been adopting microinverters. Microinverters are distributed systems that convert direct current to alternating current at the module level, with each individual solar cell module equipped with a small inverter.

[0004] Microinverters consist of a printed circuit board array (PCBA) mounted inside a case that forms the exterior, which converts current. This PCBA is equipped with a DC connector that connects to the solar module and an AC connector that connects to the AC cable that distributes the generated power. However, due to the miniaturized size of the microinverter, assembly stability for each component is limited.

[0005] The present invention aims to provide a micro inverter with improved structural stability and usability by making the assembly of the case and parts more robust.

[0006] According to one aspect of the present invention, a micro inverter is provided, comprising: a case having a circuit board disposed therein; a first connector disposed on one side of the case and connected to the circuit board; a second connector disposed on the other side of the case and connected to the circuit board; and a support bracket for supporting the case, wherein one of the case and the support bracket has a first locker disposed at an edge, and the other of the case and the support bracket has a second locker assembled with the first locker.

[0007] In a micro inverter according to an embodiment of the present invention, a first locker and a second locker connecting a case and a support bracket form a rigid assembly structure, thereby improving strength against external impact applied to the inverter and preventing the assembly between the case and the support bracket from being detached or damaged during transportation.

[0008] FIG. 1 is a drawing illustrating a micro inverter according to one embodiment of the present invention.

[0009] Figure 2 is an exploded perspective view of the micro inverter of Figure 1.

[0010] Figure 3 is an exploded perspective view of the first locker and the second locker of Figure 1.

[0011] Fig. 4 is a partial cross-sectional view taken along line IV-IV' in Fig. 1.

[0012] Figure 5 is a drawing showing an enlarged portion of part B of Figure 4.

[0013] Figure 6 is a drawing showing a front view of part A of Figure 1.

[0014] One aspect of the present invention provides a micro inverter including a case having a circuit board disposed therein, a first connector disposed on one side of the case and connected to the circuit board, a second connector disposed on the other side of the case and connected to the circuit board, and a support bracket for supporting the case, wherein one of the case and the support bracket has a first locker disposed on an edge, and the other of the case and the support bracket has a second locker assembled with the first locker.

[0015] Additionally, the first locker may have a buckle extending from the edge and having an insertion opening, a support bar extending across the insertion opening, and a mount protrusion extending downward from the buckle.

[0016] Additionally, the mount protrusion may protrude in the thickness direction of the buckle, but may protrude further outward from the buckle than in the direction toward the insertion opening.

[0017] Additionally, the cross-sectional area of ​​the above-mentioned mount protrusion may be reduced in the extension direction from the above-mentioned buckle.

[0018] Additionally, the support bars may be spaced apart by a first interval on one side of the insertion opening and by a second interval different from the first interval on the other side of the insertion opening.

[0019] Additionally, the support bar may have a top surface that contacts the second locker and a side surface that faces the second locker and may have a second slope.

[0020] Additionally, the second locker may have a hook supported by the buckle of the first locker and a mount groove into which the mount protrusion of the first locker is inserted.

[0021] Additionally, the hook may have a slope along the height direction.

[0022] Additionally, the above mount home can have a pair of above mount projections supporting the inner surface.

[0023] Additionally, the hook may have a catch that is supported on the support bar of the first locker.

[0024] The present invention is capable of various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, as well as the methods for achieving them, will become clearer with reference to the embodiments described in detail below, along with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms.

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same drawing reference numerals, and redundant descriptions thereof will be omitted.

[0026] In the examples below, the terms first, second, etc. are not used in a limiting sense, but are used for the purpose of distinguishing one component from another.

[0027] In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0028] In the examples below, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not preclude the possibility that one or more other features or components may be added.

[0029] In the following examples, when a part such as an area, component, etc. is said to be on or above another part, it includes not only the case where it is directly above the other part, but also the case where another area, component, etc. is interposed in between.

[0030] For convenience of explanation, the sizes of components in the drawings may be exaggerated or reduced. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to what is shown.

[0031] In the following examples, when it is said that areas, components, etc. are connected, it includes not only cases where the areas or components are directly connected, but also cases where other areas or components are interposed between the areas or components and are indirectly connected.

[0032] FIG. 1 is a drawing illustrating a micro inverter according to one embodiment of the present invention.

[0033] Referring to FIG. 1, a micro inverter (10) may include a first connector (300) and a second connector (400) connected to a case (100) storing a circuit board therein, and a support bracket (500) supporting the case (100).

[0034] The case (100) may have an internal space. The case (100) forms the exterior of the micro inverter (10) and may accommodate a circuit board (200) therein (see FIG. 2). The case (100) may fix the position of the circuit board (200). To this end, the internal shape of the case (100) may correspond to the shape of the circuit board (200).

[0035] The case (100) can protect the circuit board (200) placed inside. For example, considering the stable operation of the micro inverter (10) and the influence of the surrounding environment, it can have the functions of heat resistance, moisture resistance, water resistance, electrical insulation, cold resistance, oil resistance, impact resistance, and waterproof resistance.

[0036] In one embodiment, the case (100) may be comprised of an upper case (110) and a lower case (120). The case (100) may be formed by assembling the upper case (110) and the lower case (120).

[0037] The upper case (110) and the lower case (120) can be assembled to form a space inside. A circuit board (200) can be accommodated in the internal space of the upper case (110) and the lower case (120).

[0038] The upper case (110) and the lower case (120) may include connection locations of the first connector (300) and the second connector (400). The first connector (300) and the second connector (400) may be interposed between the upper case (110) and the lower case (120). When the upper case (110) and the lower case (120) are assembled, the location where the first connector (300) is connected and the location where the second connector (400) is connected can be set.

[0039] The support bracket (500) can support the bottom surface of the case (100). The support bracket (500) can be connected to the case (100). The support bracket (500) can be installed in a structure while being assembled to the case (100). The micro inverter (10) can be installed by being fixed to the desired installation location by the bracket (500).

[0040] The case (100) and the support bracket (500) can be assembled by a locking unit. The locking unit can be provided with a first locker and a second locker that are provided to be assembled with each other. When either the case (100) or the support bracket (500) has a first locker, the other can have a second locker that is assembled with the first locker.

[0041] For convenience of explanation, the following description will be based on an embodiment in which a first locker (130) is provided in a case (100) and a second locker (510) is provided in a support bracket (500).

[0042] According to one embodiment, the first locker (130) may be placed on one side of the case (100), and the second locker (510) may be placed on the support bracket (500) at a position corresponding to the first locker (130). The first locker (130) and the second locker (510) may be assembled to secure the case (100) to the support bracket (500). The first locker (130) and the second locker (510) may be provided in multiple numbers.

[0043] In an optional embodiment, the support bracket (500) may include a fixing snap (520) and an alignment member (530).

[0044] The fixed snap (520) may be positioned on a different side from the locking unit. The fixed snap (520) may be connected to the case (100) to fix the case (100) on the support bracket (500).

[0045] The alignment part (530) is positioned adjacent to the second connector (400) connected to the case (100), and can align and support the position of the plug connected to the second connector (400).

[0046] Fig. 2 is an exploded perspective view of the micro inverter (10) of Fig. 1.

[0047] Referring to FIG. 2, the micro inverter (10) may include an upper case (110), a lower case (120), a circuit board (200), a first connector (300), a second connector (400), and a support bracket (500).

[0048] The upper case (110) may include a cover portion (111), a joint groove (112), a first fitting piece (113), and a second fitting piece (114).

[0049] The cover portion (111) may be provided in the shape of a plate covering the upper portion of the circuit board (200). The cover portion (111) may correspond to the shape of the upper portion of the circuit board (200). The lower surface of the cover portion (111) may be in contact with the upper portion of the circuit board (200) to fix the position.

[0050] The joint groove (112) may be formed on the bottom surface of the cover portion (111). According to one embodiment, the joint groove (112) may be formed along the perimeter of the bottom surface of the cover portion (111). The joint groove (112) may be provided so as to be connectable to the lower case (120). A portion of the lower case (120) may be fitted into the joint groove (112).

[0051] The first fitting piece (113) is provided on one side of the cover portion (111) and can be in contact with the first connector (300) connected to the case (100). The first fitting piece (113) can be positioned adjacent to the position where the first connector (300) is connected. For example, the first fitting piece (113) can be provided as a protrusion protruding from one side of the upper case (110) toward the upper surface of the first connector (300). The first fitting piece (113) can be fastened to one side of the upper surface of the first connector (300).

[0052] The second fitting piece (114) is provided on the other side of the cover portion (111) and can be in contact with the second connector (400) connected to the case (100). The second fitting piece (114) can be positioned adjacent to the position where the second connector (400) is connected. For example, the second fitting piece (114) can be provided as a protrusion protruding from the other side of the upper case (110) toward the upper surface of the second connector (400). The second fitting piece (114) can be fastened to one side of the upper surface of the second connector (400).

[0053] The lower case (120) may include a base portion (121), a base protrusion (122), a third fitting piece (123), and a fourth fitting piece (124).

[0054] The base portion (121) can support the circuit board (200). The base portion (121) can be provided in a place shape that surrounds the bottom surface of the circuit board (200). The base portion (121) can correspond to the bottom surface shape of the circuit board (200). The circuit board (200) can be mounted on the upper surface of the base portion (121). The upper surface of the base portion (121) can be in contact with the lower surface of the circuit board (200) to fix the position.

[0055] The base protrusion (122) may be formed on the upper surface of the base portion (121). According to one embodiment, the base protrusion (122) may be formed along the upper periphery of the base portion (121). The base protrusion (122) may be provided so as to be connectable to the upper case (110). The base protrusion (122) may be inserted into a portion of the upper case (110).

[0056] The third fitting piece (123) is provided on one side of the base portion (121) and can be in contact with the first connector (300) connected to the case (100). The third fitting piece (123) can be positioned adjacent to the position where the first connector (300) is connected. For example, the third fitting piece (123) can be provided as a protrusion protruding from one side of the lower case (120) toward the bottom surface of the first connector (300). The third fitting piece (123) can be fastened to one side of the bottom surface of the first connector (300).

[0057] The fourth fitting piece (124) is provided on the other side of the base portion (121) and can be in contact with the second connector (400) connected to the case (100). The fourth fitting piece (124) can be positioned adjacent to the position where the second connector (400) is connected. For example, the fourth fitting piece (124) can be provided as a protrusion protruding from the other side of the lower case (120) toward the bottom surface of the second connector (400). The fourth fitting piece (124) can be fastened to one side of the bottom surface of the second connector (400).

[0058] The lower case (120) may include a first locker (130) on one side. The first locker (130) may be positioned at an edge of the lower case (120). The first locker (130) may be provided so as to be assembled with the second locker (510) of the support bracket.

[0059] The circuit board (200) can be placed between the upper case (110) and the lower case (120). The circuit board (200) can be accommodated in an internal space formed by assembling the upper case (100) and the lower case (120). The circuit board (200) can be supported by the upper case (100) and the lower case (120) and its position can be fixed.

[0060] The circuit board (200) can be formed by arranging predetermined circuit patterns and circuit components on one or both sides. For example, the circuit board (200) can be provided as a conventional printed circuit board assembly (PCBA). The following description assumes that the circuit board (200) is used singly, but it can also be used by integrating multiple layers as needed.

[0061] The circuit board (200) may be equipped to convert direct current power into alternating current power. The circuit board (200) may have a first connector (300) connected to one side and a second connector (400) connected to the other side.

[0062] According to one embodiment, the circuit board (200) may have a substrate portion (210), a circuit portion (220), a first connection hole (230), and a second connection hole (240).

[0063] The substrate portion (210) has a plate shape, and can have a circuit pattern printed on one or both sides, or can have a surface on which circuit components are arranged. A circuit portion (220) can be arranged on the substrate portion (210).

[0064] The circuit unit (220) may include a circuit for converting direct current power into alternating current power. The circuit unit (220) may include components such as a circuit pattern printed with copper on the substrate unit (210), an integrated circuit (IC), a capacitor, and a transformer. For example, the circuit unit (220) may include each circuit component, including a voltage boost circuit that boosts an input direct current voltage, a conversion circuit that converts direct current power into alternating current power, and the like.

[0065] A first connection hole (230) may be formed on one side of the substrate portion (210), and a second connection hole (240) may be formed on the other side. The first connection hole (230) and the second connection hole (240) may be formed in the shape of holes penetrating the substrate portion (210). The first connection hole (230) may define a position at which the first connector (300) is connected to the substrate portion (210), and the second connection hole (240) may define a position at which the second connector (400) is connected to the substrate portion (210).

[0066] The first connector (300) and the second connector (400) may be provided to connect the micro inverter (10) to the outside. The first connector (300) and the second connector (400) may be connected to an external power source and power system using a cable or other connector.

[0067] According to one embodiment, the first connector (300) may be provided as a direct current (DC) connector, and the second connector (400) may be provided as an alternating current (AC) connector.

[0068] The first connector (300) can be directly connected to the circuit board (200). One side of the first connector (300) can be connected to the circuit board (200) through the first connection hole (230).

[0069] A solar cell module (not shown) may be connected to the other end of the first connector (300). A solar cell module is a device that converts light energy into battery energy through the photovoltaic effect. The first connector (300) may receive direct current power generated by the solar cell module. The first connector (300) may transmit the input direct current power to the circuit board (200).

[0070] The second connector (400) can be directly connected to the circuit board (200). One side of the second connector (400) can be connected to the circuit board (200) through the second connection hole (240).

[0071] A power system (not shown) can be connected to the other end of the second connector (400). The second connector (400) can output AC power converted from the circuit board (200). The second connector (400) can transmit AC power to the power system via an AC output cable.

[0072] The support bracket (500) may include a second locker (510), a fixing snap (520), and an alignment portion (530) on a bracket body (501). The bracket body (501) may support the bottom surface of the lower case (120), and the bracket body (501) may have a flat upper surface.

[0073] The second locker (510) may be positioned on the upper surface of the bracket body (501) and may be arranged to correspond to the first locker (130). The second locker (510) may be provided so as to be assembled to the first locker (130).

[0074] The fixed snap (520) can be connected to the case (100) using a conventional snap-fit ​​fastening method. The snap-fit ​​fastening method is a method of connecting two parts without a separate connecting member, in which a hook is inserted into a predetermined groove or surface to fasten.

[0075] In one embodiment, the fixed snap (520) may have a snap fit structure that is connected to one side of the upper case (110) or the lower case (120). The fixed snap (520) may have at least a portion of elasticity, and may be used to forcefully connect the lower case (120) to the fixed snap (520).

[0076] The alignment portion (530) may be provided as a guide wall that protrudes from the upper surface of the bracket body (501) and is arranged parallel to both sides of the second connector (400). The alignment portion (530) may align a plug connected to the second connector (400) so that the plug is connected in the correct position.

[0077] Figure 3 is an exploded perspective view of the first locker (130) and the second locker (510) of Figure 1.

[0078] Hereinafter, the first locker (130) and the second locker (510) will be described with reference to the drawings. For this purpose, the left-right direction is referred to as the X-axis, the front-back direction is referred to as the Y-axis, and the up-down direction is referred to as the Z-axis, based on the micro inverter (10) illustrated in the drawings.

[0079] According to FIG. 3, the first locker (130) can be placed on the case (100) side, and the second locker (510) can be placed on the bracket body (501) side.

[0080] The first locker (130) may include a buckle (131), a support bar (132), a mount protrusion (133), a support portion (134), and a protective wall portion (135).

[0081] The buckle (131) may be formed by extending from the edge of the case (100). The buckle (131) may have a polygonal or oval ring shape that contacts the edge surface of the case (100). The buckle (131) may have an insertion opening (1311) that penetrates in the Z-axis direction.

[0082] The support bar (132) can be positioned across the insertion opening (1311). The support bar (132) can be formed in a bar shape extending in the X-axis direction. At least a portion of the support bar (132) can have elasticity. Accordingly, the support bar (132) can be restored after being partially bent by an external force.

[0083] The mount protrusion (133) may be formed to extend downward from the buckle (131). The mount protrusion (133) may be provided as a protrusion that is positioned on the outermost surface of the buckle (131) and protrudes downward along the Z-axis. The mount protrusion (133) may be positioned to face the mount groove (513) of the second locker (510).

[0084] According to one embodiment, the mount protrusions (133) may be provided in pairs. A joint piece (1331) may be arranged between the pair of mount protrusions (133). The joint piece (1331) may be formed as a wall portion connecting the pair of mount protrusions (133). The joint piece (1331) may be formed to have a thickness that is thinner than or the same as that of the mount protrusions (133).

[0085] The support portion (134) is positioned below the buckle (131) and can support the bottom surface of the buckle (131). The buckle (131) can be connected to one side of the case (100) by the support portion (134). For example, the support portion (134) can be formed in the shape of a wall extending from the buckle (131) and can be installed on the edge of the case (100). As another example, the support portion (134) can be formed in a single shape that is integral with the buckle (131) and the case (100).

[0086] The protective wall portion (135) may be formed to extend upward from the buckle (131) and be positioned above the buckle (131). The protective wall portion (135) may be formed as a wall that is positioned on the outermost surface of the buckle (131) and forms a height in the upward direction along the Z-axis. The protective wall portion (135) may be formed in a shape that surrounds the front of the insertion opening (1311).

[0087] A handle portion (1351) may be formed on the top of the protective wall portion (135). The handle portion (1351) may provide a portion to be held by hand when assembling or disassembling the first locker (130) and the second locker (510).

[0088] The second locker (510) may include a hook (511), a reinforcement piece (512), and a mount home (513).

[0089] The hook (511) may be formed to extend upward from the bracket body (501). At least a portion of the hook (511) may be elastic and may be restored after being bent by an external force.

[0090] The hook (511) may have a reduced width in the extension direction, thereby reducing its cross-sectional area. Accordingly, when an external force is applied to the hook (511), the upper portion of the hook (511) may easily bend, but the lower portion may have rigidity.

[0091] The hook (511) may be provided with a catch (5111) at the top. The catch (5111) may be formed by protruding from the surface of the hook (511) facing the case (100).

[0092] A reinforcing piece (512) may be placed on both sides of the lower portion of the hook (511). The reinforcing piece (512) may be positioned at the connection portion between the hook (511) and the bracket body (501). The reinforcing piece (512) may be formed in a shape that protrudes from the side of the hook (511). The reinforcing piece (512) may reinforce the rigidity of the lower portion of the hook (511), thereby preventing damage to the hook (511).

[0093] A mount groove (513) may be formed on the upper surface of the bracket body (501). The mount groove (513) may be positioned adjacent to the hook (511) and spaced apart from the hook (511) in the Y-axis direction. The mount groove (513) may be positioned to face the mount protrusion (133) of the first locker (130) in the upper and lower directions. The mount groove (513) may be provided so that the mount protrusion (133) can be inserted therein.

[0094] Fig. 4 is a partial cross-sectional view taken along line IV-IV' in Fig. 1.

[0095] Referring to FIGS. 1 to 4, the micro inverter (10) can be formed by assembling a case (100) in which an upper case (110) and a lower case (120) are assembled to a support bracket (500).

[0096] The joint groove (112) and the base protrusion (122) can be formed in shapes corresponding to each other. The base protrusion (122) is inserted into the joint groove (112), so that the upper case (110) and the lower case (120) can be assembled. The assembled case (100) can be placed on the bracket body (501).

[0097] Referring to FIG. 4, the first locker (130) and the second locker (510) are provided so as to be assembled with each other, so as to connect the lower case (120) and the support bracket (500).

[0098] Specifically, as the hook (511) is assembled to the buckle (131) from the bottom up, and the mount protrusion (133) is assembled from the top down, the first locker (130) and the second locker (510) can be formed with a double bonding force in the Z-axis direction.

[0099] The buckle (131) is formed on the edge of the lower case (120) and may have an insertion opening (1311). A support portion (134) extending from the lower case (120) may support the bottom surface of the buckle (131).

[0100] The support portion (134) may be provided as a wall portion extending between the buckle (131) and the lower case (120). Since the support portion (134) is formed in an integral shape with the buckle (131) and the lower case (120), the structural stability of the buckle (131) can be improved.

[0101] The hook (511) can be inserted into the insertion opening (1311) of the buckle (131). The hook (511) can be fastened by being caught by the support bar (132) through the catch (5111) arranged at the top of the hook (511). The hook (511) and the support bar (132) have a predetermined elasticity, so that the hook (511) and the support bar (132) can be easily fastened by being partially bent. Accordingly, a bonding force in the Z-axis direction can be formed between the hook (511) and the support bar (132).

[0102] The mount protrusion (133) may be provided as a protrusion extending downward from the buckle (131). The mount protrusion (133) may have a thickness that decreases as it goes downward along the Z-axis. The mount protrusion (133) may have a first thickness (T1) at the top and a second thickness (T2) at the bottom. The first thickness (T1) may be provided to be thicker than the second thickness (T2).

[0103] At this time, the mount protrusions (133) are provided as a pair, and the space between the two mount protrusions (133) can be connected by a joint piece (1331). Since the joint piece (1331) is provided with a thinner thickness than the mount protrusions (133), when an external force is applied to the mount protrusions (133) on both sides, elasticity and buffering force can be formed in the joint piece (1331).

[0104] When the mount protrusion (133) is inserted into the mount groove (513), a pair of mount protrusions (133) are supported on the side walls of the mount groove (513) facing each other in the X-axis direction, so that the first locker (130) and the second locker (510) can generate a bonding force in the X-axis direction.

[0105] Since the mount protrusion (133) decreases in thickness and cross-sectional area in the extension direction, the mount protrusion (133) can be easily inserted when first inserted into the mount groove (513). Thereafter, since the thickness of the inserted mount protrusion (133) has a section that is equal to the inner width of the mount groove (513), frictional resistance is formed at the contact surface of the mount protrusion (133) and the mount groove (513), so that they can be fastened to each other. Accordingly, when the mount protrusion (133) is assembled to the mount groove (513) and the catch (5111) of the hook (511) is supported by the support bar (132), the first locker (130) and the second locker (510) can form a coupling force in the Z-axis direction.

[0106] According to one embodiment, the first locker (130) and the second locker (510) may be formed with a double bonding force in the Y-axis direction.

[0107] The hook (511) may be formed to protrude upward, but not perpendicular to the bracket body (501), and may be formed to be inclined in one direction. The hook (511) may be provided to be inclined toward the case (100). A repulsive force may be formed at the surface where the hook (511) and the support bar (132) come into contact. A force in the -Y direction may be applied to the hook (511), and a force in the +Y direction may be applied to the support bar (132). Therefore, a bonding force in the Y-axis direction may be formed between the hook (511) and the support bar (132).

[0108] The mount protrusion (133) may protrude in the thickness direction of the buckle (131), but may protrude further outward from the buckle (15) than in the direction toward the insertion opening (1311). That is, the mount protrusion (133) may be formed to be more inclined toward the outer surface of the buckle (131) than toward the inner surface of the buckle (131). Accordingly, the mount protrusion (133) may be pressed against the inner surface of the mount groove (510), as illustrated in FIG. 4. A repulsive force may be formed at the contact surface between the mount protrusion (133) and the mount groove (513). A force in the +Y direction may be applied to the mount protrusion (133), and a force in the -Y direction may be applied to the mount groove (513). Therefore, a coupling force in the Y-axis direction may be formed between the mount protrusion (133) and the mount groove (513).

[0109] In an optional embodiment, the hook (511) may further include a pressing member (5112) at the top. The pressing member (5112) may be provided as an inclined surface between the top of the hook (511) and the catch (5111). By pressing the pressing member (5112), the hook (511) may be bent away from the case (100), and the connection between the hook (511) and the support bar (132) may be released.

[0110] The protective wall portion (135) may be positioned above the buckle (131) and formed to surround at least a portion of the insertion opening (1311). In one embodiment, the protective wall portion (135) may be provided as a wall extending in the height direction from the buckle (131). Since the protective wall portion (135) is formed to surround at least the front side of the insertion opening (1311), the fastening area of ​​the hook (511) and the support bar (132) can be protected.

[0111] The handle portion (1351) may be positioned on the upper side of the protective wall portion (135). The handle portion (1351) may be formed such that a portion thereof extends in the thickness direction from the outer surface of the protective wall portion (135).

[0112] The user can easily assemble the first locker (130) and the second locker (510) by holding the handle portion (1351) and handling the case (100). In addition, the user can easily separate the first locker (130) and the second locker (510) by holding the handle portion (1351) and pressing it against the pressing portion (5112) of the buckle.

[0113] Figure 5 is a drawing showing an enlarged portion of part B of Figure 4.

[0114] Referring to FIG. 5, the support bar (132) may be spaced apart by a first distance (D1) on one side of the insertion opening (1311) and by a second distance (D2) different from the first distance (D1) on the other side of the insertion opening (1311).

[0115] The hook (511) can be inserted into a portion of the insertion opening (1311) having a first gap (D1). When force is applied to the pressing piece (5112) to rotate the hook (511), the hook (511) can rotate within the first gap (D1).

[0116] The support bar (132) is provided with a predetermined elasticity and has a free space of the second gap (D2) within the insertion opening (1311), so that it can be bent and restored.

[0117] The support bar (132) may have a first bar inclined surface (132a) on the upper surface that contacts the hook catch (5111), and a second bar inclined surface (132b) on the side that faces the inside of the hook. At this time, the corner formed between the first bar inclined surface (132a) and the second bar inclined surface (132b) may be formed into a curved surface.

[0118] The hook (511) may have a first hook slope (511a) on the bottom surface of the catch (1511) and a second hook slope (511b) on the side facing the support bar (132).

[0119] The first bar slope (132a) and the first hook slope (511a) have the same slope angle, so that they can have the first slope. The first hook slope (511a) can make full contact with the first bar slope (132a).

[0120] The second bar slope (132b) and the second hook slope (511b) may have different slope angles. The second bar slope (132b) may have a second slope, and the second hook slope (511b) may have a third slope different from the second slope. The second bar slope (132b) and the second hook slope (511b) may not contact each other.

[0121] In order to separate the hook (511) and the support bar (132), when force is applied to the pressing piece (5112) to rotate the hook (511) outward, since the edge between the first bar inclined surface (132a) and the second bar inclined surface (132b) has a curved surface, the first hook inclined surface (511a) can easily slide with respect to the first bar inclined surface (132a).

[0122] In addition, since the second hook slope (511b) does not come into contact with the second bar slope (132b), no frictional resistance occurs between them, and thus rotation of the hook (511) may not be impeded.

[0123] According to one embodiment, the hook (511) and the support bar (132) may be provided to maintain an assembled state when no force is applied to the presser piece (5112), and to separate only when necessary. To this end, the first incline may be designed to have an incline angle that rotates the hook (511) only when force is applied to the presser piece (5112). The second incline may be provided differently from the first incline, and may be designed to have an appropriate incline angle in consideration of the curvature of the edge between the first bar incline surface (132a) and the second bar incline surface (132b). The third incline may be designed to have an incline angle that prevents the second bar incline surface (132b) from contacting the second hook incline surface (511b).

[0124] Figure 6 is a drawing showing a front view of part A of Figure 1.

[0125] Referring to FIGS. 1 and 6, the mount protrusion (133) may be formed as a pair of protrusions extending downward from the buckle (131) and spaced apart by a predetermined width. The space between the pair of mount protrusions (133) may be connected by a connecting piece (1331). As described above, the connecting piece (1331) may form elasticity and cushioning force between the pair of mount protrusions (133).

[0126] In one embodiment, the mount protrusions (133) may have a width that decreases as they go down along the Z-axis. A pair of mount protrusions (133) may have a first width (W1) at the top and a second width (W2) at the bottom.

[0127] The inner width of the mount home (513) may have a third width (W3). The third width (W3) may be provided to be smaller than the first width (W1) and larger than the second width (W2).

[0128] Since the mount protrusion (133) decreases in width and cross-sectional area in the extension direction, the mount protrusion (133) can be easily inserted when first inserted into the mount groove (513). The mount protrusion (133) can have a section in which the width of the inserted portion becomes equal to the third width (W3), and a pair of mount protrusions (133) can be fitted and coupled to the inside of the mount groove (513).

[0129] When a pair of mount protrusions (133) are fitted into the mount groove (513), pressure can be applied to the mount protrusions (133) on both sides. Since the joint piece (1331) forms a predetermined elastic force and a buffering force against the pressure applied in both directions, the mount protrusions (133) and the mount groove (513) can be more closely attached. Accordingly, a bonding force in the X-axis direction can be formed between the mount protrusions (133) and the mount groove (513). Even if a twisting force in the left and right direction is applied to the assembly portion of the mount protrusions (133) and the mount groove (513), a resistance to this can be formed.

[0130] According to one embodiment of the present invention, a micro inverter (10) can form a rigid assembly structure with a first locker (130) and a second locker (510) connecting a case (100) and a support bracket (500). As a result, the micro inverter (10) can have improved strength against external impacts and can prevent the assembled portion from being detached or damaged during transportation.

[0131] According to one embodiment of the present invention, a micro inverter (10) can maintain a stable assembly state by forming a strong assembly force and bonding force in the three-axis direction between the first locker (130) and the second locker (510). The mount protrusion (133) of the first locker (130) is inserted into the mount groove (513) of the second locker (510), and the hook (511) of the second locker (510) is inserted into the buckle (131) and supported by the support bar (132).

[0132] At this time, a pair of mount protrusions (133) are supported on both side walls facing each other in the X-axis direction of the mount home (513), so that the first locker (130) and the second locker (510) are firmly connected in the X-axis direction.

[0133] In addition, since the hook (511) and the mount groove (513) are spaced apart in the Y-axis direction and the mount protrusion (133) is supported on a wall extending in the X-axis direction of the mount groove (513), and the elastic hook (511) is supported on the support bar (132), the first locker (130) and the second locker (510) are firmly coupled in the Y-axis direction.

[0134] In addition, since the hook (511) of the hook (511) is supported on the support bar (132) and a pair of mount protrusions (133) are inserted into the mount groove (513), the first locker (130) and the second locker (510) are firmly connected in the Z-axis direction.

[0135] According to one embodiment of the present invention, a micro inverter (10) has a reinforced fastening between a case (100) and a support bracket (500), so that the circuit board (200) and other components built into the case (100) can be protected, and power conversion performance can be stably operated.

[0136] While the present invention has been described with reference to one embodiment illustrated in the accompanying drawings, this is merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be determined solely by the appended claims.

Claims

1. A case in which a circuit board is placed inside; A first connector disposed on one side of the case and connected to the circuit board; A second connector disposed on the other side of the case and connected to the circuit board; and The above case includes a support bracket; One of the above case and the above support bracket has a first locker arranged at an edge; A micro inverter, wherein the other of the case and the support bracket has a second rocker assembled with the first rocker.

2. In paragraph 1, The above first locker A buckle extending from the above edge and having an insertion opening; a support bar extending across the insertion opening; and A micro inverter having a mount projection extending downward from the above buckle.

3. In paragraph 2, The above mount protrusion A micro inverter that protrudes in the thickness direction of the buckle, but protrudes further outward from the buckle than in the direction toward the insertion opening.

4. In paragraph 2, The above mount protrusion A micro inverter whose cross-sectional area decreases in the extension direction from the above buckle.

5. In paragraph 2, The above support bar A micro inverter spaced apart by a first interval on one side of the insertion opening and spaced apart by a second interval different from the first interval on the other side of the insertion opening.

6. In paragraph 2, The above support bar A micro inverter, wherein the upper surface in contact with the second rocker has a first slope, and the side facing the second rocker has a second slope.

7. In paragraph 1, The above second locker a hook supported on the buckle of the first locker; and A micro inverter having a mount groove into which the mount protrusion of the first locker is inserted.

8. In paragraph 7, The above hook is a micro inverter having an incline along the height direction.

9. In paragraph 7, The above mount home A micro inverter having a pair of above-mentioned mount projections supporting the inner surface.

10. In paragraph 7, The above hook A micro inverter having a catch supported on a support bar of the first locker.

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